__!! This Exam is now online at__{link:JavaBlackbelt.com|http://javablackbelt.com/QuestionnaireDefDisplay.wwa?questPublicId=01609} \\ \\ __OSGi Basic Exam__ \\ 1 Target audience Software Developers with basic java knowledge but no osgi knowledge at all. 1 Learning Resources - {link:A very good tutorial by Neil Bartlett|http://neilbartlett.name/blog/osgi-articles/} - {link:Small snippets who just cover a particular aspect by Peter Kriens|http://www.aqute.biz/Snippets/HomePage} - {link:OSGi Tutorial|http://www.aqute.biz/OSGi/Tutorial} 1 This covers - basic mantras about OSGi (marketing knowledge) - basic terminology - basic bundle behaviour - OSGi Specification R4 (does not touch 4.1 changes) 1 This does not cover - Java ClassLoading principles - OSGi Service Layer - OSGi Security Layer - how to load/use native code - Fragment/Extension Bundles - Lazy Activation Policies - Event/Listeners - interpreting legacy bundles - split packages ---- 1 General (2 questions) - describe the unit of modularization in osgi - describe the relationship of osgi bundles to eclipse plugins - describe what OBR stands for 1 the manifest ( 3 questions) - identify the osgi bundle meta data descriptor from a list of jar entries - detect incorrect bundles from a list of jar entries - From a selection of manifest headers identify the mandatory ones - be able to tell the default values for the following headers -- Bundle-Classpath -- Bundle-ManifestVersion -- Bundle-Version 1 bundle contents (2 question) - know how bundles are packaged usually (technically speaking) - identify legal/illegal contents of a bundle 1 common syntax knowledge ( 2 questions) - from a list of version-strings identify incorrect ones - be able to order version-strings - detect incorrect header syntax 1 import/export directives (4 questions) - show how to use the following directives to extend/enable visibility of java packages: -- export-package -- import-package -- private-package - find missing import-package for a given (small) bundle - find redundant import-package for a given (small) bundle - configure a bundle so that it substitutes a package - avoid using require-bundle header using import-package - Show how you can make a given importing package optional 1 Lifecycle Layer: Bundle States (4 questions) - Show the difference of the following bundle states: INSTALLED, RESOLVED, ACTIVE - predict the bundle-identifier after a framework restart - show how you can execute bundle code directly on bundle startup / stop - identify the system bundle from a list of bundles - predict the behaviour if the system bundles shuts down - show the requirements to start a bundle 1 Basic API (3 questions) - from a list of interfaces, determine the one that provides the main lifecycle methods for a bundle - show how can get the system bundleContext reference - show how you programmatically shutdown the framework - identify a valid BundleActivator implementation - predict the bundle state if an uncatched exception is thrown inside Activator.start() or Activator.stop() - predict the outcome of calling the following lifecycle-methods on the System Bundle: -- start -- stop -- update -- uninstall 2008-01-26 15:47:49.514 2008-01-13 11:15:21.815 Process